It was written after he was injured in Santa Cruz de Tenerife in 1797, and addressed to Thomas Lloyd Esq in London.

It is due to be sold in Halls’ auction of fine furniture, European ceramics and works of art in Shrewsbury on February 26, and is valued at £4,000.

Halls’ books specialist Aaron Dean said that the letter gives a fascinating insight into the mind of Admiral Lord Nelson.

Mr Dean said: ‘This is a great part of British history.

‘The letter was written in Nelson’s left hand while he was recuperating in Bath from losing his arm. An inflammatory ligature impeded his recovery, however this eventually came out naturally and the letter reveals that he was pushing for his next command with the Royal Navy.’